Which one of the following statements accurately describes a characteristic of red blood cells?
a. they lack hemoglobin.
b. they're convex disks with a large nucleus.
c. they're agents of inflammation.
d. they transport oxygen to all the cells of the body.

Scientist wanted to formulate a pool to attack a specific type of bacteria that infects with you. what biological component would be best to use as a model for the pills function?

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants